(Answered) Question 1 how many different sets of initials can be

Statistics

Question: 1. How many different sets of initials can be formed if every person has one surname and

(a) exactly two given names,

(b) at most two given names,

2. Letters in the Morse code are formed by a succession of dashes and dots with repetitions permitted. How many letters is it possible to form with ten symbols or less?

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